Obstay
An Obstay is a person who knows a little bit about a lot of things and acts like they know everything.
My teacher is an Obstay. She’ll explain how the moon affects tides but can’t spell 'tide' correctly.
My cousin is an Obstay. She’ll talk about space and then forget her own birthday.
My friend is an Obstay. She knows about dogs, cats, and dinosaurs, but doesn’t know how to tie her shoes.